显控电路在现代精密测深仪中担当着重要角色，它是与测深仪的用户直接发生联系的部分。
The presentation controller circuit plays an important role in the modern precision instruments and it is the part directly connecting with sounders users.
在海洋测深过程中，回声测深仪波束角效应使记录的测深图像失真。
In bathymetric survey, the record seabed image is distorted due to the angular beam width of an echo sounder.
在海洋测深中，由于回声测深仪波束角效应的影响，对凸形海底的测量会带来较大的失真。
The record seabed image distorted due to the angular beam-width of echo-sounder in bathymetric, especially for gibbous terrain.
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